CSF Aluminium Triple Pass Performance Radiator for BMW E46 M3 (2000-2006, S54) Direct-Fit 2-Row B-Tube Core Track/Race Cooling Upgrade

Alloy Cooling Radiator Upgrade for BMW M3 E46 S54 - CSF Three Pass, Dual Row B Tube Core

Keep your S54 running cool on fast road, circuit and drift days with CSF’s race-bred alloy heat exchanger for the M3 E46. This plug-and-play cooler slots into the factory location, works with the original quick-connect hoses and stock shrouding, and delivers the temperature control serious drivers demand.

Why enthusiasts choose this CSF cooler

• Two-row B tube core for maximum efficiency and greater surface area than the OE unit
• High density, multi-louvred fin pack engineered for rapid heat rejection
• Three pass flow path to extend coolant dwell time and boost thermal transfer under sustained load
• Increased tube count versus stock for improved coolant stability and flow
• OEM-style mounting points - retains factory cowling and clip-on hose connections for a straightforward install
• Built by CSF Racing & High Performance for durability you can trust

Track-proven cooling for hard-driven S54s

The compact dual row B tube architecture offers the cooling capacity of a larger core without excessive weight. Combined with a three pass layout, you get notably lower coolant temps, reduced heat soak and consistent performance in hot weather, traffic, and flat-out sessions. Ideal for time attack, HPDE, drifting, spirited B-road driving and daily use where reliability matters.

Real-world results

We have installed and run this CSF alloy radiator on our own builds and for customer cars. Feedback is consistently positive - stable temperatures lap after lap, quick recovery after cooldown laps and peace of mind on long stints.

Vehicle compatibility

BMW M3 E46 3.2 S54, model years 2000 to 2006. Designed to work with factory shrouds, clip-on hoses and standard mounting locations for a clean, hassle-free replacement.

Installation guidance

After fitting, bleed the cooling system thoroughly to remove air pockets. Fresh coolant and a pressure test are recommended. Professional installation advised for best results.

Prefer expert fitting. MJ Modifications in Warwickshire can install and set up this cooling upgrade. Request a quote at info@mjmodifications.co.uk.

Quality and warranty

Manufactured by CSF’s Racing & High Performance division with strict quality control and premium materials. Backed by a two-year warranty against manufacturing defects.

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Buy with confidence

Unlock dependable temperature control and protect your S54 when it counts. This CSF alloy radiator outperforms tired stock units and typical budget options while keeping factory fit and finish. Order now and drive harder for longer.